[Dovecot] Dovecot Deliver CPU usage

Hi All,

We have upgraded the dovecot from 1.0 to 1.2.8. After upgradation we have noticed that dovecot deliver process is utilizing a lot of CPU. As a result the mailsystem will stop working. When we limit the no of procs in postfix for dovecot deliver the CPU usage will come down. But we are not facing this problem with the previous version. Below is the log files for dovecot when the error occurs

write_full(/home/vmail/dhanbank.co.in/vinukumarvm/temp.server.be3e5a849a909847) failed: No space left on device dovecot: deliver(user@example.com): stat(/tmp/Dovecot Delivery Mail) failed: No space left on device

But my system has 54gb of free space for root filesystem where tmp residing. Can anyone help me to solve this issue.

Rgds, Aravind